As Requested by Arif

Dear Arif and all 4N1s (2009), to ask questions regarding a particular topic, you need to create a new post and preferably if you can , type the question here or embed the question as a picture file. Then I will give tips as comments.

anyway, here are the clues to Set A Q4-5







Can you see the patterns? For more info., refer to ch. 6 of your textbook.